package xyz.kongbai121.shop.auth.controller;

import com.alibaba.fastjson.TypeReference;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import xyz.kongbai121.common.constant.AuthServerConstant;
import xyz.kongbai121.common.exception.BizCodeEnume;
import xyz.kongbai121.common.utils.R;
import xyz.kongbai121.common.vo.MemberRespVo;
import xyz.kongbai121.shop.auth.feign.MemberFeignService;
import xyz.kongbai121.shop.auth.feign.ThirdPartFeignService;
import xyz.kongbai121.shop.auth.vo.UserLoginVo;
import xyz.kongbai121.shop.auth.vo.UserRegistVo;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;


@Controller
@Slf4j
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    /**
     * 发送一个请求直接跳转到一个页面
     * springMVC viewcontroller:将请求跟页面映射过来
     */

    @ResponseBody
    @RequestMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone){
        // todo 1.接口防刷
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (redisCode != null) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60 *1000) {
                //60秒内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }
        //2.验证码验证
        String code = UUID.randomUUID().toString().substring(0, 5);
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, code+"_"+System.currentTimeMillis(), 10, TimeUnit.MINUTES);
        thirdPartFeignService.sendCode(phone,code);
        return R.ok();
    }

    //todo 重定向携带数据, 利用session原理, 将数据存到session中, 只要跳到下个页面取出数据后, 数据就会自动删掉
    //todo 分布式下的session问题
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes){
        if (result.hasErrors()){
            /*result.getFieldErrors().stream().map(error->{
                String field = error.getField();
                String defaultMessage = error.getDefaultMessage();
                map.put(field,defaultMessage);
            })*/
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错,转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //真正注册, 调用远程服务进行注册
        //1.校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)){
            if (code.equals(s.split("_")[0])){
                //删除验证码;令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过
                R r = memberFeignService.regist(vo);
                if (r.getCode() == 0){
                    //成功
                    return "redirect:http://auth.gulimall.com/login.html";
                }else {
                    //失败
                    HashMap<String, String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("msg",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }

            }else {
                HashMap<String, String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                //校验出错,转发到注册页
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else {
            HashMap<String, String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错,转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session){
        //远程登录
        R login = memberFeignService.login(vo);
        if (login.getCode() == 0) {
            MemberRespVo data = login.getData(new TypeReference<MemberRespVo>() {});
            log.info("登录成功:用户信息{}",data);
            session.setAttribute("loginUser",data);
            return "redirect:http://gulimall.com";
        }else {
            HashMap<String, String> errors = new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("msg",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute("loginUser");
        if (attribute != null){
            return "redirect:http://gulimall.com";
        }
        return "login";
    }
}
